hello, measuring "fast" is difficult - but i think nowadays there's not much discrepancy in performance between browsers - each of them has advantages in different areas: http://www.tomshardware.com/reviews/chrome-27-firefox-21-opera-next,3534-3.html
mozilla is always working to make the browser faster on various fronts: https://wiki.mozilla.org/Performance
arewefastyet.com

Question owner

probably it's a matter of taste - also google has MUCH more financial power and does bundle its browser with PCs of certain manufacturers and third-party software. in addition it has more screen estate on the web where it can advertise and promote its browser (just visit www.google.com with a non-google browser)...

probably it's a matter of taste - also google has MUCH more financial power and does bundle its browser with PCs of certain manufacturers and third-party software. in addition it has more screen estate on the web where it can advertise and promote its browser (just visit www.google.com with a non-google browser)...